[RE-wrenches] Pairing OB with Lithium

[Lou Russo]

HomeGrid. LVD setpoint for HomeGrid falls within range of the Outbacks, so
LVD actually works, 3R(ish) enclosure and a built-in display.
Can't speak for longevity, the oldest one we got out there is 3 years old
or so, but no issues as of yet.
As noted on this forum,the firmware update process is brutal but we have
not done one in 1.5 years and I have heard it has improved.

Aloha,
Lou Russo
Spree Solar Systems LLC
C-34322



On Sun, Jun 29, 2025 at 1:55 AM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi Wayne.
>
> As it’s an offgrid system open loop my preference is for batteries that
> have a built in display so you don’t need wifi/web connection to monitor.
>
> If the customer has a FNDC or trimetric the accuracy of those with lithium
> can take a while to dial in.
> Having an actual % reading on the battery has been very helpful to the few
> dozen systems I’ve retro fitted lithium into offgrid systwms.
>
> I also look for batteries that give setup  settings for open loop. Most
> don’t.
>
> Ive used a few brands and have been happy with eg4.
>
> Out of curiosity 5kwh seems extremely small.
>
> Jay
>
> On Jun 28, 2025, at 9:05 PM, Wayne Irwin via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> We have an off-grid customer who has a 10KW array and 2 - VFXR3648's, 2 -
> FM 80's and dying lead acid batts.
>
> I'm looking for advice on pairing something in the range of +/-5 kWh of
> Lithium (preferably LFP).
> I have not yet paired OB with lithium. Compatibility and Reliability are
> my goal.
> What has worked best for you?
>
> Your experience and advice are greatly appreciated.
>
> Wayne Irwin
> President
> License #CVC56695
> State Licensed Solar Contractor
> Pure Energy Solar International Inc.
> Wayne at PureEnergySolar.com
> PureEnergySolar.com <http://pureenergysolar.com/>
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> 352 336-3299 Fax
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